Concrete is composed of cement, aggregate (including crushed rock and sand) and water. In homes, it's frequently seen in the foundation, driveway, sidewalk, patio, and stone walls. Note that bricks use mortar in the joints, not concrete.

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Raised Concrete Patio Drainage

I recently purchased this house which has a raised concrete patio in the rear that has a large depression in the middle probably 4' wide by 6' long. You can see the cracks in the concrete where the ...
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How to support the side of concrete steps?

Last spring, we decided to remove a concrete walkway (and much of the soil underneath it) behind our house and replace it with either a pea gravel or decomposed granite patio with boxwoods and a fire ...
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How much concrete for a fence post?

We're going to build up a 4' fence around our property sometime in here in the spring or summer with 4x4 posts. I've seen that you should bury 1/3 to 1/2 of the above ground post height; so this ...
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71 views

Anatomy of a concrete wall – what are all these layers called?

So my partner and I are trying to resurface a concrete wall in an old house in Taiwan. Before I get into the nitty gritty of asking how, I just want to clarify my terminology first – I think I've got ...
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88 views

Can I drill a small hole in a concrete beam?

I need to pass a bipolar electrical cable through a concrete beam (30cm high, 15 cm wide) (12x6 inches). The hole would need to be about 1cm (3/8"). Is it safe to drill through it? There is no wall ...
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Hanging clothes on a line between concrete pillars without drilling

Question says it all: I'd like to hang a "light" load (say 30 t-shirts/pants) between two concrete pillars, without doing anything permanent to the pillars, like drilling (they are public property and ...
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1answer
35 views

Relatively new concrete porch crack

About 6 months ago a contractor poured a concrete slab to serve as a porch. The slab rests directly on the ground and measures 25' by 4' and is 4" thick. The slab has remesh under it, no gravel, but ...
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1answer
59 views

Can I pour concrete next to my foundation?

I'm planning to install a 4x4 fence into the ground by digging up a hole, adding some gravel, then pouring concrete in. Is it a problem if the concrete touches the foundation of the house? I've added ...
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4answers
374 views

Hand tool for packing dirt

What is a good simple hand tool for packing small surfaces of dirt to prepare it for laying concrete? I've seen big pneumatic hammers at large construction sites and was wondering if there is a good ...
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1answer
52 views

Should concrete stair landing be anchored to building?

I have a small, approximately 3x3' concrete landing in front of my basement door, from which stairs go up to the street level. I need to redo it and was wondering whether to tie the rebar from under ...
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30 views

Concrete stairs substrate preparation and layering

I need to pour small stair entry into my basement, about 4 steps and it is narrow, with a brick retention wall on both sides. I was going to first evenly grade and pack the dirt, then put gravel, ...
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24 views

Gravel under concrete stairs

Laying gravel under flat concrete slabs is easy because the levelness of dirt bed makes it easy to distribute it evenly. But when preparing to pour concrete stairs on a graded bed, what are good ways ...
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438 views

How can I properly support a raised concrete patio?

I am planning on building a raised concrete patio. I would like to build the perimeter of block and fill it with stone and then cap it in concrete to be finished with blue stone later. The patio will ...
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166 views

Concrete patio against the house

I am going to be starting a project in which I will be pouring my patio next to my home, it will be approx 10' x 50' The home is on a concrete slab, no basement. I have to two questions. What is ...
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1answer
93 views

Is a floating perimeter slab a good approach for a dirt-floor shed?

I'm building a 16' x 7' shed and chicken coop in Seattle. I want it to have a dirt floor and be safe from predators crawling underneath. I've been struggling with how best to do the "foundation". I ...
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1answer
35 views

Where to install underfloor heating under tile; thinset layer or concrete?

Putting in either a thermal wire/mesh (SunTouch) type underfloor heater or carbon film under tile. The subfloor is OSB. Going to pour 3/4" of LevelQuik Self-Leveling Concrete (replacing Gyp-Crete ...
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2answers
557 views

Installing Drywall on Concrete Ceiling?

I have a concrete ceiling in my basement and would like to cover it with drywall. Specifically, I would like to take the flat surface concrete ceiling and put another ceiling under it so that I can ...
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1answer
42 views

Self-leveling alternatives to gypsum concrete (Gyp-Crete, Pyrofill, Securock) over OSB?

Replacement options for < 1.5 inch pour? Details: Bathroom remodel (new tub, tile wall/floor, toilet, vanity). Old tile floor came up with finger pressure, found that the gypsum concrete ...
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1answer
31 views

Do I need a vapor barrier on an 8" pour + carpeting over tile?

So I am finishing my basement and the side I'm finishing has an extra 4" pour on it as well as old 8x8 asbestos tile. My plan is to carpet over it. Do I need a vapor barrier? I get that concrete is ...
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92 views

What are the specifics I should be looking for in a quote to replace my concrete steps?

The front steps in front of my house are deteriorating. I am trying to get a contractor to replace the limestone slab steps with concrete. For example, enclosed is a picture of my estimate from 2016. ...
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1answer
62 views

Is permeable concrete suitable for a houses foundations?

I'm curious if using permeable or pervious concrete for all or part of a houses foundations would provide excellent flood protection? Would it be strong enough to support a house and if not could it ...
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37 views

Failing foundation outside wall looks like it is buckling but it's not

My contractor poured a grey beam on the outside of the failing wall but it over time made it worse. I was wondering if I make a 3 plate beam out of 2 by 10 approx 20 feet long put it on the inside on ...
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1answer
46 views

Good, affordable pathway materials for sidewalk with tree root problems

I recently moved into my first home. Unfortunately, the concrete slab pathway leading from the town sidewalk to the front door is buckling from the roots of an enormous pine tree that grows near it. ...
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62 views

Load Bearing or Not How Can I Know For Sure

We have an unusual 3 inch thick poured concrete floor in a steel mesh in the ground floor of our house, under this is a basement like area with an old riveted steel across half of it and a couple of ...
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1answer
55 views

Can I use mortar to fill channels in a concrete floor?

I recently had central heating installed in my 2 bedroom ground floor maisonette. We installed all the pipes in the channels which we dug in the concrete floor. I have covered all the pipes with ...
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3answers
67 views

How can I achieve a Quartz look using concrete for a bar top?

I want to make my own concrete bar top but I would like it to have a bit of a sparkle like quartz has. Any suggestions?
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49 views

How to mount handrail to drywall over concrete

Any help how to hang the railing back up on the stairway. It is townhouse wall with drywall and concrete behind it.
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182 views

How to cut concrete block with a circular saw

I have some concrete blocks that are 4 inches by 6 inches. I need to cut them in half at a 45 degree angle. Can I do this with a circular saw and a masonry blade ? I would also make a jig to cut ...
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46 views

What is a suitable mold material for a concrete bar top?

I would like to make an L-shaped concrete bar top (single piece). However, I want to make the corner have a large curve (12-15" radius?). How can I create a mold to accomplish this? What materials ...
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42 views

Can a seat wall and fire pit be built on existing pavers patio?

I have an existing circular area in my uncovered paver patio area. I would like to have two curved seat walls, either stucco or stone veneer with flag stone or cement seats and no back, and a fire pit ...
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1answer
47 views

Wall leaks due to rotten wood in footer!

My home was built in 1979, and I have a small leak in the basement. It appears to me that the water is coming from a piece of 1x4 that is embedded in the footer, presumably this wood goes all the way ...
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1answer
149 views

Cleaning indoor concrete floor without damaging it

I just finished helping a colleague clean out his (large) garage at his new house. He's gradually converting it to a indoor gym for himself and his kids (ie: indoor swing set, toys, etc, with a small ...
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Mount wooden post onto uneven concrete [duplicate]

Hi I'm wanting to mount a 112x112x3000 post onto a concrete slab. I have purchased L shaped brackets to do the job. Because the post will sit at the edge of the concrete I can install at most three ...
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1answer
96 views

Installing long 20ft metal poles in concrete around a football pitch

I work at a football club and I need to install some long 20 ft metal poles into the ground set in concrete. My question is how deep must the holes be and what diameter hole needs digging. The poles ...
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Concrete Floor for 400 Gallon Water Tank

I am planning to build a concrete slab on a soil surface to hold a 400 gallon water tank (Shown Below). I want to make it 7' x 7'. It should hold about 3,500 lbs. Would I need to put in rebar? I've ...
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2answers
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What material provides semi-permanent, strong bonding with a concrete floor?

The professionals doing repairs at a workplace seem to be capable of patching stairs with material so tough, and make it stick to the existing cement with such strength, that the patching survives ...
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3answers
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How can I pour a concrete floor/slab with two levels?

I am pouring a slab for a concrete floor for an 1800 sq foot house and would like the bathroom area to be about 3/8" lower than the rest so I can tile it and wind up with the floor and seams that are ...
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How to run wire through steel garage floor system

We are building a carriage house, with a 4 car garage and a basement underneath. The basement has steel I-beams and the metal b-decking that the garage floor is poured on top of as a ceiling. What ...
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Why are there metal tabs protruding from my poured concrete foundation walls?

What are these metal things sticking out from my basement walls? Can they be removed? If so, how?
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1answer
83 views

How long does concrete dust take to settle

I'm getting some wiring done and having the electrician chase the new wires. The walls are concrete so I know that this is going to make a huge mess and need serious work after the electrical stuff is ...
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1answer
65 views

Concrete question(s) about garage

I'm in a new to me house and have a few questions regarding the concrete setup in the garage. Most importantly, it is getting very dirty with the winter driving and caked with mud constantly. I have ...
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2answers
140 views

What type of cleaner should I use to remove a puke stain from concrete?

My cat puked on the basement floor in a couple places, but I can't seem to clean the stain. So far I've tried simply mopping with Pine-Sol®, which didn't work. Then I tried scrubbing/mopping with ...
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1answer
43 views

How to find a plastered hole?

I have a small issue. Few months ago my apartment got renovated, and I listed all holes in walls i want to keep for future use. The rest was, depending on depth, filled with concrete or plastered. And ...
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1answer
661 views

What are these metal tags attached to my poured concrete basement wall?

What are these metal pieces attached to my basement poured concrete walls? They are about 2x2 with holes and were pressed into some kind of goop. These walls were poured in 1979. Can I remove them?
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69 views

Electric shock from pellet stove

I accidentally let some hot pellets fly out of my pellet stove while stupidly cleaning the glass while it was on. The few pellets melted some of the carpet. I put them out with some water. When i went ...
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1answer
75 views

How do I fix this depression in my concrete patio?

I have a concrete patio with a 4-foot by 2-foot shallow oval area that retains water. The concrete is sort of a knockdown pattern (see photo). How do I resolve this depression without smoothing it ...
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3answers
83 views

New Basement Floor, house not framed yet

We are building a new house with an exposed basement. I had the floors poured a week ago while still warm in December. We have not framed the house up yet, meaning no deck, walls, roof, or HEAT. My ...
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379 views

Pouring concrete for fence posts in heavy rain

My contractor just poured the concrete and set the posts for a new fence we are getting and much of the work was done in the pouring rain. Will this hurt the concrete and effect how it holds up down ...
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1answer
41 views

Greenhouse (cold frame) side walls - footing question

Planning a hoop house, or cold frame style greenhouse. I live in Nebraska, we get pretty consistent winds, not unusual to have 50 mph gusts. I want set two parallel 3-4 ft tall rows of 4x4 posts, 4 ...
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2answers
94 views

Is it common for vertical joints to not be filled?

We live in a high-rise apartment, and the shower room cinder-block wall is covered by sheet rock. The wall separates our apartment from our neighbors' apartment. Anyway, I noticed that the blocks ...